Writing instrument



FIG. 1 is a perspective view of a writing instrument, showing our new design;

FIG. 2 is a front view of the writing instrument;

FIG. 3 is a rear view of the writing instrument;

FIG. 4 is a top view of the writing instrument;

FIG. 5 is a bottom view of the writing instrument;

FIG. 6 is a left side view of the writing instrument;

FIG. 7 is a right side view of the writing instrument; and,

FIG. 8 is an enlarged bottom view of the writing instrument.

The parts shown in broken lines are portions of the mechanical pencil that form no part of the claimed design. 

CLAIM The ornamental design for a writing instrument, as shown and described. 